Onychomycosis – Page 2

Antifungal susceptibility testing of Microsporum canis isolated from the skin of dermatologically healthy cats

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Researchers found that about 5% of healthy cats in Chile carry a fungal infection called Microsporum canis that can spread to humans. The concerning discovery is that all strains tested were resistant to fluconazole, a commonly used antifungal medication. The study shows that indoor cats are at higher risk of carrying this fungus and suggests that screening healthy cats could help prevent transmission to people who have close contact with them.

Emergence of resistant dermatophytosis caused by Trichophyton indotineae: First case series in Thailand

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Researchers in Thailand have identified five patients with a difficult-to-treat fungal skin infection caused by Trichophyton indotineae, a type of dermatophyte that resists the commonly used antifungal drug terbinafine. This is the first time this resistant fungus has been detected in Thailand. The team developed a simple, inexpensive test using urease to help identify these resistant infections more easily. Patients responded well to the antifungal drug itraconazole after other treatments failed.

Epidemiology of Onychomycosis in the United States Characterized Using Molecular Methods, 2015–2024

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This large study examined over 710,000 nail samples to identify which fungi cause nail infections in the United States. Using modern molecular testing combined with microscopic analysis, researchers found that while the fungus T. rubrum is most common, other molds and yeasts cause many infections too. Importantly, women and older adults are more likely to have infections from these other organisms, which are often harder to treat with standard antifungal medications.

Wildlife Dermatophytoses in Central Italy (Umbria and Marche Regions): A Fifteen-Year Investigation (2010–2024)

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Researchers in central Italy studied fungal skin infections in wild animals over 15 years to understand disease patterns and public health risks. They found that about 11% of wild animals tested positive for dermatophytes (skin fungi), with some species dangerous to humans. The most common fungi found were Paraphyton mirabile and Trichophyton mentagrophytes, which can spread to people through contact with infected animals. The study highlights the importance of monitoring wildlife health and using protective equipment when handling wild animals.

Onychomycosis with gray-green staining caused by Fusarium solani

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A 76-year-old gardener developed a gray-green discolored thumbnail that was initially thought to be a bacterial infection. Testing revealed it was actually caused by a fungus called Fusarium solani, which unusually produced dark-green colonies. The patient was successfully treated by removing the affected nail and applying an antifungal medication, demonstrating the importance of proper fungal testing for nail infections.

Diagnostic Performance of a PCR-Based Approach for the Diagnosis of Dermatomycosis

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This study evaluated a new testing method combining DNA analysis (PCR) with traditional microscopy and culture to diagnose fungal skin, hair, and nail infections. The PCR method detects the infection quickly and accurately, identifying the specific fungus causing the problem within days rather than weeks. The study of over 4,400 samples found that Trichophyton rubrum was the most common cause of fungal infections, and the combined testing approach was 98.5% accurate while reducing unnecessary lab work.

Onychomycosis in the US Pediatric Population—An Emphasis on Fusarium Onychomycosis

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This study examined nail fungus infections in American children using advanced molecular testing. Researchers found that elementary school-aged children (ages 6-11) have the highest rates of nail fungus, usually caused by common fungi like Trichophyton rubrum. Notably, Fusarium, an environmental fungus that was once rare in nail infections, is becoming increasingly common, especially in older teenagers, which may require different treatment approaches.

Synthesis, Physicochemical Properties and Anti-Fungal Activities of New Meso-Arylporphyrins

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Researchers created three new porphyrin compounds that effectively kill fungal infections like Candida and athlete’s foot fungi. These compounds can also generate singlet oxygen when exposed to light, making them potentially useful for photodynamic therapy treatments. Testing showed they inhibited fungal growth at relatively low concentrations, suggesting they could become new antifungal medications.

Performance of the VITEK® MS system for the identification of filamentous fungi in a microbiological laboratory in Chile

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Researchers tested a fast machine called VITEK® MS for identifying dangerous mold infections in patients. The machine correctly identified over 91% of fungal samples, which is much better than waiting weeks for traditional laboratory methods. This technology could help doctors start treatment much faster for patients with serious mold infections, potentially saving lives.

Emergence of resistant dermatophytosis caused by Trichophyton indotineae: First case series in Thailand

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Researchers in Thailand identified five patients with a new type of fungal skin infection caused by Trichophyton indotineae, a species that resists the common antifungal drug terbinafine. These infections appeared as rashes on various parts of the body and required treatment with alternative medications like itraconazole. The findings represent the first confirmed cases in Thailand and suggest this resistant fungus may be spreading globally. The study also showed that a simple urease test could help doctors identify this resistant strain quickly without waiting for complex genetic testing.

Disease: Onychomycosis